Often, there are multiple collections with the same kind of elements, that we would have to loop on. Instead of writing two for loops over the collections, we can use the Concat operator in LINQ to loop thru the collections in one go.
string[] emeaClients = { "John Frank", "Carine Bothe" };string[] northAmericanClients = { "John Ferry", "Mickey Kate" };foreach (var client in emeaClients.Concat(northAmericanClients)){ Console.WriteLine(client);} 
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